The pest a cator rodent repellent uses pulse technology to sends silent pulsing signal through your homes wiring * Plugs into standard electrical outlet; multiple units are needed for multiple stories; keeps your family safe and your home clean * For problem areas, this unit has ultrasonic technology with added sound waves for problem areas * Designed to help aid in rodent problems for moderately sized homes, apartments or condos * Measures 2-inches in width by 6.8-inches in length by 8.5-inches in height